CN203432081U - Thermal conduction oil furnace for horizontal type circulating fluidized bed - Google Patents

Thermal conduction oil furnace for horizontal type circulating fluidized bed Download PDF

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Publication number
CN203432081U
CN203432081U CN201320492972.8U CN201320492972U CN203432081U CN 203432081 U CN203432081 U CN 203432081U CN 201320492972 U CN201320492972 U CN 201320492972U CN 203432081 U CN203432081 U CN 203432081U
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furnace
combustion chamber
conduction oil
horizontal type
main combustion
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康建斌
王谦
胡峰
张哲�
李俊臣
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BEIJING NOWVA ENERGY TECHNOLOGY Co Ltd
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BEIJING NOWVA ENERGY TECHNOLOGY Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

The utility model relates to circulating fluidized bed burning equipment of inferior coal, solid waste, urban and industrial sludge and biomass fuel, in particular to a heating device of thermal conduction oil, and provides a thermal conduction oil furnace for a horizontal type circulating fluidized bed. The thermal conduction oil furnace is mainly composed of a feeding device, a main burning chamber, an auxiliary burning chamber, a burning-off chamber and a cyclone separator. Thermal conduction oil coil pipes are distributed in the main burning chamber and the burning-off chamber, an economizer and an air pre-heater can be arranged behind the cyclone separator, and a waste heat boiler can be arranged. By adopting the horizontal type circulating fluidized bed technology in the heating device of the thermal conduction oil, the traditional structural form adopting a chain grate furnace for heating is changed, the traditional structure of the single stage and vertical circulation of a circulating fluidized bed boiler is changed, the height of the boiler is effectively lowered, and the requirement for the factory construction height is lowered. Through the reasonable structural layout, the problem that the circulating fluidized bed boiler wears easily is effectively solved, and the thermal conduction oil furnace is high in adaptability to fuel, high in burning efficiency and small in discharge amount of pollutants.

Description

A kind of Horizontal type circulating fluid bed heat-conducting oil furnace
Technical field
The utility model relates to a kind of heat-conducting oil furnace, specifically a kind of heat-conducting oil furnace that adopts Horizontal type circulating fluid bed technology.
Background technology
Heat-conducting oil furnace is a kind of new special boiler that heat transfer oil is heat medium of take, and has low-voltage high-temperature operating characteristic.Although the operating pressure of organic heat carrier furnace is lower, in stove, heat transfer oil temperature is high, and mostly has inflammable and explosive characteristic, once be in operation, leaks, and will cause fire, and the accidents such as blast, even cause casualties and property loss.Therefore, to the common requirement of organic heat carrier furnace, be in the high energy efficiency of guaranteeing under the prerequisite of security, due to the wear problem of CFB Boiler Operation to heating surface in the past, make the recirculating fluidized bed type of furnace never in organic heat carrier furnace, put it over, apply.Current heat-conducting oil furnace mainly adopts the combustion systems such as hand fired grate, traveling-grate stoker, moulded coal fire grate, and these combustion systems not only will use high-quality bituminous coal, and the thermal efficiency is low, energy waste is serious, Air Pollutants Emissions is high.
Chinese patent CN2924401Y has announced a kind of " boiling heat-conducting oil burner " technology, and this technology is applied to Boiling Combustion mode on heat-conducting oil furnace, adopts conventional vertical circulation fluidized-bed combustion boiler technology, and one-level is returned ash, and boiler height is higher, and factory building construction investment is high; This technology is provided with heat-conducting oil pipes at the emulsion zone of burner hearth, has transducer wall ' s abrasion and safe operation hidden danger; This technology is used Secondary Air as returning charge wind simultaneously, the flexibility of furnace air distribution while having lost for different fuel characteristic or boiler load variation; This technology is not mentioned the burning of biomass fuel in addition, and whether its arrangement and air distribution mode can wait check by biomass burning.Chinese patent CN1786565A has announced a kind of Horizontal type circulating fluid bed combustion apparatus and circulating combustion method thereof, this technology still has longer high temperature flow process when effectively reducing furnace height, but this technology main combustion chamber, subsidiary combustion chamber and secondary furnace all adopt membrane wall structure, for the layout of conduction oil coil pipe, also do not explain.
Utility model content
The deficiency and the defect that for prior art, exist, the purpose of this utility model is to propose a kind of heat conduction oil boiler that adopts Horizontal type circulating fluid bed technology, to solving the existing heat-conducting oil furnace high-quality bituminous coal that can only burn, and efficiency of combustion is low, the problem that Air Pollutants Emissions is high.
The technical solution of the utility model is as follows: a kind of Horizontal type circulating fluid bed heat-conducting oil furnace, and it comprises charging gear, main combustion chamber, subsidiary combustion chamber, secondary furnace, cyclone separator, separator outlet flue and air-introduced machine; Main combustion chamber lower disposed air distribution plate, arranges a wind apparatus in the lower end of air distribution plate; Main combustion chamber emulsion zone is arranged abrasion-proof and refractory pouring layer; Subsidiary combustion chamber and secondary furnace arranged beneath are returned ash bucket, return ash bucket arranged beneath one-level material-returning device; Cyclone separator arranged beneath secondary material-returning device; One-level refeed line is connected with main combustion chamber emulsion zone respectively with the outlet of secondary refeed line, it is characterized in that: in described main combustion chamber and secondary furnace, arrange respectively heat conductive oil inlet header, conduction oil outlet header and two-stage conduction oil coil pipe, two-stage conduction oil coil pipe adopts series connection form to hover above main combustion chamber and secondary furnace inwall; Described main combustion chamber, subsidiary combustion chamber and secondary furnace are adiabatic furnace.
In technique scheme, the hot flue gas of the cyclone separator of flowing through enters back-end ductwork through separator outlet flue, is furnished with economizer import header, economizer and air preheater in back-end ductwork; Conduction oil enters economizer through economizer import header, and after hot flue gas adverse current heat exchange, enters the heat conductive oil inlet header in secondary furnace.
Another technical scheme of the present utility model is: this heat-conducting oil furnace also comprises waste heat boiler, and smoke gas flow, after air preheater, is connected with waste heat boiler through connecting flue.Or separator outlet flue is directly connected with waste heat boiler, the hot flue gas of the cyclone separator of flowing through enters waste heat boiler through separator outlet flue.
Technical characterictic of the present utility model is also: at the arranged beneath overfire air device of intersection, subsidiary combustion chamber and the secondary furnace of main combustion chamber emulsion zone and dilute-phase zone.At the arranged beneath flue gas recirculation interface of intersection, subsidiary combustion chamber and the secondary furnace of main combustion chamber emulsion zone and dilute-phase zone, flue gas recirculation interface is connected with boiler induced-draft fan exhaust pass by flue, realizes flue gas recirculation.One-level refeed line and horizontal line angle are 0 °~45 °, and secondary refeed line and horizontal line angle are 30 °~60 °.It is highly 1/4~1/3 of main combustion chamber height that abrasion-proof and refractory pouring layer is arranged, the section of burner hearth that emulsion zone bottom abrasion-proof and refractory pouring layer surrounds is 0.2~0.3 with the ratio of the sectional area of dilute-phase zone burner hearth.
The utlity model has the technique effect of following advantage and high-lighting: 1. owing to adopting Horizontal type circulating fluid bed technology, fuel tolerance is wide, high-temperature flue gas flow process is long, efficiency of combustion is high, and by the proportioning of wind and Secondary Air, effectively burning inferior coal, solid waste, city and industrial sludge, biomass fuel.2. owing to adopting Horizontal type circulating fluid bed technology, the burning of burner hearth inner cryogenic, has effectively controlled the generation of nitrogen oxide, by burner hearth delivered inside lime stone, can realize desulfuration in furnace simultaneously, and desulfuration efficiency is high, and boiler tail Air Pollutants Emissions is low.3. at main combustion chamber emulsion zone, arrange abrasion-proof and refractory pouring layer, abrasion-proof and refractory pouring layer wrapping portion conduction oil coil pipe, and by choosing rational sectional area, also effectively controlled flue gas flow rate, alleviated the wearing and tearing to conduction oil coil pipe.4. owing to adopting Horizontal type circulating fluid bed technology, by reducing boiler height, the initial outlay while effectively having reduced workshop building.
Accompanying drawing explanation
The structural principle schematic diagram of a kind of Horizontal type circulating fluid bed heat-conducting oil furnace embodiment that Fig. 1 provides for the utility model.
Fig. 2 is Horizontal type circulating fluid bed heat-conducting oil furnace section of burner hearth schematic diagram.
Fig. 3 is the structural principle schematic diagram of another kind of embodiment of the present utility model, after separator outlet flue, arranges the schematic diagram of economizer and air preheater.
In figure: 1-charging gear; 2-air distribution plate; 3-overfire air device; 4-conduction oil coil pipe; 5-main combustion chamber; 6-subsidiary combustion chamber; 7-returns ash bucket; 8-one-level material-returning device; 9-one-level refeed line; 10-secondary furnace; 11-separator; 12-secondary material-returning device; 13-secondary refeed line; 14-economizer; 15-air preheater; Wind apparatus of 16-; 17-abrasion-proof and refractory pouring layer; 18-separator outlet flue; 19-flue gas recirculation interface; 20-heat conductive oil inlet header; 21-conduction oil outlet header; 22-economizer import header.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model and the course of work are further described.
Fig. 1 is a kind of Horizontal type circulating fluid bed heat-conducting oil furnace of the utility model schematic diagram, and it comprises charging gear 1, main combustion chamber 5, subsidiary combustion chamber 6, secondary furnace 10, cyclone separator 11, separator outlet flue 18 and air-introduced machine; Main combustion chamber 5 lower disposed air distribution plates 2, arrange a wind apparatus 16 in the lower end of air distribution plate 2; Main combustion chamber 5 emulsion zones are arranged abrasion-proof and refractory pouring layer 17; Subsidiary combustion chamber 6 returns ash bucket 7 with secondary furnace 10 arranged beneath, returns ash bucket 7 arranged beneath one-level material-returning devices 8; Cyclone separator 11 arranged beneath secondary material-returning devices 12; One-level refeed line 9 is connected with main combustion chamber emulsion zone respectively with the outlet of secondary refeed line 13; In main combustion chamber 5 and secondary furnace 10, arrange respectively heat conductive oil inlet header 20, conduction oil outlet header 21 and two-stage conduction oil coil pipe 4, two-stage conduction oil coil pipe 4 adopts series connection form to hover above the inboard wall of burner hearth of main combustion chamber and secondary furnace; Main combustion chamber 5, subsidiary combustion chamber 6 and secondary furnace 10 are adiabatic furnace; At the arranged beneath flue gas recirculation interface 19 of intersection, subsidiary combustion chamber 6 and the secondary furnace 10 of main combustion chamber 5 emulsion zones and dilute-phase zone, flue gas recirculation interface 19 is connected with boiler induced-draft fan exhaust pass by flue, realizes flue gas recirculation; At the arranged beneath overfire air device 3 of intersection, subsidiary combustion chamber 6 and the secondary furnace 10 of main combustion chamber 5 emulsion zones and dilute-phase zone, overfire air device 3 is connected with blower export air channel by air channel, and two place's overfire air devices 3 can be used alone and regulate; One-level refeed line 9 is 0 °~45 ° with horizontal line angle, and secondary refeed line 13 is 30 °~60 ° with horizontal line angle; Abrasion-proof and refractory pouring layer 17 arranges to be highly 1/4~1/3 of main combustion chamber height, and the section of burner hearth that emulsion zone bottom abrasion-proof and refractory pouring layer 17 surrounds is 0.2~0.3 with the ratio of the sectional area of dilute-phase zone burner hearth.
The hot flue gas of cyclone separator 11 of flowing through can directly enter waste heat boiler through separator outlet flue 18, the heat conductive oil inlet header 20 of conduction oil in secondary furnace enters the intensification of absorbing heat in the conduction oil coil pipe 4 of two-stage series connection, finally enters conduction oil outlet header 21.Hot flue gas continues heat release and is cooled to after uniform temperature in waste heat boiler, is disposed in atmosphere.The heat that waste heat boiler can utilize flue gas to discharge is prepared steam or hot water.
The hot flue gas of cyclone separator 11 of flowing through enters the back-end ductwork that is furnished with economizer 14 and air preheater 15 through separator outlet flue 18, hot flue gas can continue to be directed to waste heat boiler in back-end ductwork after heat release, the heat that waste heat boiler can utilize flue gas to continue to discharge is prepared steam or hot water.
Fig. 2 is the utility model boiler furnace schematic cross-section, and conduction oil coil pipe 4 is arranged in main combustion chamber 5 and secondary furnace 10, and two-stage conduction oil coil pipe adopts the form of series connection, hovers above inboard wall of burner hearth.The heat conductive oil inlet header 20 of conduction oil in secondary furnace enters in conduction oil coil pipe absorbs heat, then in being directed to the conduction oil coil pipe in main combustion chamber, continues by conduit heat absorption, through conduction oil outlet header 21, drawn boiler afterwards, completed the endothermic process of conduction oil.
Fig. 3 is the structural principle schematic diagram of another kind of embodiment of the present utility model, after separator outlet flue, arranges the schematic diagram of economizer and air preheater.The hot flue gas of cyclone separator 11 of flowing through can enter back-end ductwork through separator outlet flue 18, the hot flue gas of cyclone separator 11 of flowing through can enter back-end ductwork through separator outlet flue 18, is furnished with economizer 14, air preheater 15 and economizer import header 22 in back-end ductwork; Conduction oil enters economizer 11 through economizer import header 22, with after hot flue gas adverse current heat exchange, enter the heat conductive oil inlet header 20 in secondary furnace 10, conduction oil continues heat absorption in the conduction oil coil pipe 4 in main combustion chamber and secondary furnace and heats up, and finally enters conduction oil outlet header 21.Hot flue gas continues heat release and is cooled to after uniform temperature in back-end ductwork, is disposed in atmosphere.
Operation principle of the present utility model and process are as follows:
Fuel is transported on charging gear 1 by artificial or machine power, and the bed under the effect of an air compartment 16 on air distribution plate 2 is expected into fluidized state, bed material and fuel mix burning; High-temperature flue gas flow through main combustion chamber 5, subsidiary combustion chamber 6 and secondary furnace 10; By overfire air device 3, to the burner hearth postcombustion required oxygen that burns, in main combustion chamber 5 dilute-phase zones and secondary furnace 10, arrange conduction oil coil pipe 4; By air distribution and control returning charge, high-temperature flue gas is controlled between 800~900 ℃, sufficiently long high-temperature flue gas flow process has guaranteed the abundant burning of fuel simultaneously, and burner hearth inside has also completed desulfurization and the generation of controlling nitrogen oxide; By being arranged in time ash bucket 7 and cyclone separator 11 of subsidiary combustion chamber 6 and secondary furnace 10 belows, flying dust is captured and by one-level refeed line 9 and secondary refeed line 13, is delivered to main combustion chamber 5 respectively by one-level material-returning device 8 and secondary material-returning device 12, form ash circulation, in the situation that control fire box temperature, material is fully burnt.By being arranged in flue gas recirculation interface and the overfire air device of intersection, subsidiary combustion chamber and the secondary furnace below of main combustion chamber emulsion zone and dilute-phase zone, realize effective adjusting of flue gas recirculation and Secondary Air, flue gas recycled is from air-introduced machine exhaust pass, and flue-gas temperature is lower; Secondary Air is from atmosphere, and temperature is environment temperature.By flue gas recirculation interface and overfire air device, cold flue gas and cold wind are directed to burner hearth, can effectively control fire box temperature, avoid burner hearth to occur that coking, overtemperature etc. affect the factor of safe operation.
Conduction oil enters conduction oil outlet header after absorbing heat in conduction oil coil pipe and heating up; Hot flue gas after the heat release of burner hearth internal combustion, enters to be furnished with and in the back-end ductwork of economizer and air preheater or waste heat boiler, continues heat release and be cooled to after exhaust temperature, drains into atmosphere.

Claims (8)

1. a Horizontal type circulating fluid bed heat-conducting oil furnace, it comprises charging gear (1), main combustion chamber (5), subsidiary combustion chamber (6), secondary furnace (10), cyclone separator (11), separator outlet flue (18) and air-introduced machine; Main combustion chamber (5) lower disposed air distribution plate (2), arranges a wind apparatus (16) in the lower end of air distribution plate (2); Main combustion chamber (5) emulsion zone is arranged abrasion-proof and refractory pouring layer (17); Subsidiary combustion chamber (6) returns ash bucket (7) with secondary furnace (10) arranged beneath, returns ash bucket (7) arranged beneath one-level material-returning device (8); Cyclone separator (11) arranged beneath secondary material-returning device (12); One-level refeed line (9) is connected with main combustion chamber emulsion zone respectively with the outlet of secondary refeed line (13), it is characterized in that: in described main combustion chamber (5) and secondary furnace (10), arrange respectively heat conductive oil inlet header (20), conduction oil outlet header (21) and two-stage conduction oil coil pipe (4), two-stage conduction oil coil pipe (4) adopts series connection form to hover above the inboard wall of burner hearth of main combustion chamber and secondary furnace; Described main combustion chamber (5), subsidiary combustion chamber (6) and secondary furnace (10) are adiabatic furnace.
2. a kind of Horizontal type circulating fluid bed heat-conducting oil furnace according to claim 1, it is characterized in that: the hot flue gas of the cyclone separator of flowing through (11) enters back-end ductwork through separator outlet flue (18), in back-end ductwork, be furnished with economizer import header (22), economizer (14) and air preheater (15); Conduction oil enters economizer (11) through economizer import header (22), with the heat conductive oil inlet header (20) entering after hot flue gas adverse current heat exchange in secondary furnace (10).
3. a kind of Horizontal type circulating fluid bed heat-conducting oil furnace according to claim 2, is characterized in that: smoke gas flow, after air preheater (15), is connected with waste heat boiler through connecting flue.
4. a kind of Horizontal type circulating fluid bed heat-conducting oil furnace according to claim 1, it is characterized in that: described separator outlet flue (18) is directly connected with waste heat boiler, the hot flue gas of the cyclone separator of flowing through (11) enters waste heat boiler through separator outlet flue (18).
5. a kind of Horizontal type circulating fluid bed heat-conducting oil furnace according to claim 1, is characterized in that: at the arranged beneath overfire air device (3) of intersection, subsidiary combustion chamber (6) and the secondary furnace (10) of main combustion chamber (5) emulsion zone and dilute-phase zone.
6. according to a kind of Horizontal type circulating fluid bed heat-conducting oil furnace described in the arbitrary claim of claim 1~5, it is characterized in that: at the arranged beneath flue gas recirculation interface (19) of intersection, subsidiary combustion chamber (6) and the secondary furnace (10) of main combustion chamber (5) emulsion zone and dilute-phase zone, flue gas recirculation interface (19) is connected with boiler induced-draft fan exhaust pass by flue, realizes flue gas recirculation.
7. according to a kind of Horizontal type circulating fluid bed heat-conducting oil furnace described in the arbitrary claim of claim 1~5, it is characterized in that: one-level refeed line (9) is 0 °~45 ° with horizontal line angle, secondary refeed line (13) is 30 °~60 ° with horizontal line angle.
8. according to a kind of Horizontal type circulating fluid bed heat-conducting oil furnace described in the arbitrary claim of claim 1~5, it is characterized in that: abrasion-proof and refractory pouring layer (17) arranges to be highly 1/4~1/3 of main combustion chamber height, and the section of burner hearth that emulsion zone bottom abrasion-proof and refractory pouring layer (17) surrounds is 0.2~0.3 with the ratio of the sectional area of dilute-phase zone burner hearth.
CN201320492972.8U 2013-08-13 2013-08-13 Thermal conduction oil furnace for horizontal type circulating fluidized bed Active CN203432081U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103423869A (en) * 2013-08-13 2013-12-04 北京热华能源科技有限公司 Heat-conduction oil furnace of horizontal circulating fluidized bed
CN106678784A (en) * 2017-01-19 2017-05-17 北京热华能源科技有限公司 Multi-process circulating fluidized bed boiler capable of feeding fuel in classified mode
CN113063150A (en) * 2021-03-30 2021-07-02 大连理工大学 Novel low-pollution bubbling bed gasification combustion reaction device and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103423869A (en) * 2013-08-13 2013-12-04 北京热华能源科技有限公司 Heat-conduction oil furnace of horizontal circulating fluidized bed
CN103423869B (en) * 2013-08-13 2016-04-13 北京热华能源科技有限公司 A kind of Horizontal type circulating fluid bed heat-conducting oil furnace
CN106678784A (en) * 2017-01-19 2017-05-17 北京热华能源科技有限公司 Multi-process circulating fluidized bed boiler capable of feeding fuel in classified mode
CN106678784B (en) * 2017-01-19 2018-09-11 北京热华能源科技有限公司 It is a kind of to be classified to the multipath circulating fluidized bed boiler of fuel
CN113063150A (en) * 2021-03-30 2021-07-02 大连理工大学 Novel low-pollution bubbling bed gasification combustion reaction device and method

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GR01 Patent grant
C14 Grant of patent or utility model
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Heat-conduction oil furnace of horizontal circulating fluidized bed

Effective date of registration: 20160726

Granted publication date: 20140212

Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee

Pledgor: Beijing Nowva Energy Technology Co., Ltd.

Registration number: 2016990000630

PLDC Enforcement, change and cancellation of contracts on pledge of patent right or utility model
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20180629

Granted publication date: 20140212

Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee

Pledgor: Beijing Nowva Energy Technology Co., Ltd.

Registration number: 2016990000630

PC01 Cancellation of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Heat-conduction oil furnace of horizontal circulating fluidized bed

Effective date of registration: 20180629

Granted publication date: 20140212

Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee

Pledgor: Beijing Nowva Energy Technology Co., Ltd.

Registration number: 2018990000509

PE01 Entry into force of the registration of the contract for pledge of patent right